test: Add tests for string_to_info_block_data

tests/utilities/test_string_to_info_block.py

@@ -0,0 +1,29 @@
+from src.blinkstick.utilities import string_to_info_block_data
+
+
+def test_string_to_info_block_data_converts_string_to_byte_array():
+    block_string = "hello"
+    expected_padding_length = 31 - len(block_string)
+    result = string_to_info_block_data("hello")
+    expected = b"\x01hello" + b"\x00" * expected_padding_length
+    assert result == expected
+
+
+def test_string_to_info_block_data_handles_empty_string():
+    result = string_to_info_block_data("")
+    expected = b"\x01" + b"\x00" * 31
+    assert result == expected
+
+
+def test_string_to_info_block_data_truncates_long_string():
+    long_string = "a" * 40
+    result = string_to_info_block_data(long_string)
+    expected = b"\x01" + b"a" * 31
+    assert result == expected
+
+
+def test_string_to_info_block_data_handles_exact_31_characters():
+    exact_string = "a" * 31
+    result = string_to_info_block_data(exact_string)
+    expected = b"\x01" + b"a" * 31
+    assert result == expected